Zero twist yarn tensioning device



Aug. 25, 1953 H. M. ADAMS ZERO TWIST YARN TENSIONING DEVICE Filed Oct. 9, 1950 F' r v I N V EN TOR. Hal J72. .flclanzs Patented Aug. 25, 1953 ZERO TWIST YARN TENSIONING DEVICE Hal M. Adams, Robbins, N. 0., assignor to Bobbins Mills, Incorporated, New York, N. '2'., a

corporation of New York Application October 9, 1950, Serial No. 189,227

1 Claim.

This invention relates to a tensioning device for handling yarn and particularly yarn having very little or zero twist. My invention is of particular importance in the blending or plying of zero twist acetate yarn with nylon, which may be accomplished by the use of any of the standard makes of throwing or doubling machines.

In 'prior plying of zero twist yarn where ordinary guides were used with common tensioning machines it was found that due to the filament construction of the zero twist yarn, that is, the yarn with the filaments laying in parallel or substantially parallel position, the tension would cause the yarn to spread out, thus subjecting the individual filaments to unusual strain. As a result of such strain the yarn would strip back, and broken filaments and slubs were caused,

An object of this invention is to provide a tensioning device in which the zero twist filaments or filaments having a very slight twist will be held together under proper tension and may be plied with nylon or other yarn prior to entering the doubling machine where the acetate and nylon are twisted together.

A further object of the invention is to provide a tensioning device wherein the yarn passes over the tensioning device without any slippage or friction which would cause the separation of the filaments.

Other objects and advantages of my invention will appear from the accompanying drawing and the following specification in which a preferred form of my device is shown applied to conventional machinery.

Referring more particularly to the drawings Fig. l is a side elevation showing the tensioning device.

Fig. 2 is a detailed view partly in section showing the type of rollers used.

Fig. 3 is an end view of the roller employed.

Referring more particularly to the drawings, the conventional creel support I0 is provided with a plurality of brackets l I, I2 and I4 and the creel guide wire 19. Bracket l4 mounts conventional jackpins 15, I5, I1 and I8. On the jackpins I1 and I8 I mount the roller 20, which forms the most important feature of the tensioning device. Each of the rollers 20 consists of a steel cylindrical member 2| having a core or bore 22 with oil lite bushings 23 and a cork cover 24. While the tensions are not critical, I have found that a steel roller approximately one inch in diameter and two and one-quarter inches long. having a quarter-inch cork cover with metal oil lite bearings to be highly efficient and satisfactory.

I have shown a double segment tube 30 of acetate mounted on the creel board. The acetate yarn 3| is pulled on to a pigtail eye 32 in the creel guide wire 19 and then led to the pigta'il 33 on the tension device which controls the yarn entrance to the device. The yarn, after leaving the pigtail 33, is raised around the cork rollers 20 three times in a clockwise direction so as to form a plurality of runs extending between the rollers. This raising causes the cork rollers to revolve when the yarn is in running position, and the weight of the rollers determines the amount of tension or grants tension on the end of the acetate.

A bobbin 40 of nylon yarn 4| is placed on the jackpin l6 and is revolved in a clockwise direction over the guide rod 42 through the eyelet 43 over and the guide rod 44 to the guide 45 leading to the doubling machine. At the guide 42, it meets with the acetate yarn 3| and the two yarns aretwisted together. Because of the nature of the cork covered roller and its ability to rotate freely with the passage of the yarn over it, no slippage is allowed and no friction or uneven tension occurs. By revolving the cork covered rollers in direct relationship to the yarn no broken filaments or slubs are caused and the tension of the yarn in grams per denier is very even. I thus eliminate the slubs and breakage of the individual filaments which occurs when the yarn is led over the conventional tensioning means or even where revolving rollers having a smooth polished surface are used. The weight of the rollers is such that the tension applied can be controlled and will be even throughout.

While I have described a preferred form of my I invention and the use of specific materials, it will be appreciated that modifications may be made without departing from the spirit of my invention and that the basic concept is the use of weighted rollers running freely on the jackpins and having contact surfaces which will prevent slippage and spreading of the yarn and more particularly of yarn having a zero twist.

I claim:

A yarn tensioning device comprising a source of yarn, a pair of rotatably supported freely turning rollers having an outer covering of cork, said yarn being passed about said rollers in contact with said cork so as to form a plurality of runs extending between said rollers.

' HAL M. ADAMS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 407,634 Bonte July 23. 1889 474,381 Hagadom et a1 May 10, 1892 751,930 Lundgren Feb. 9. 1904 1,158,432 Benoit Nov. 2. 1915 2,158,547 Lawson et a1 May 16, 1939 2,185,245 Cotchett Jan. 2, 1940 2,266,632 Frey Dec. 16, 1941 2,306,660 Gift Dec. 29. 1942 2,328,322 Berthold Aug. 31, 1943 

